Timing device



Dec. 1, 1964 J. L. HAMILTON 3,158,987

TIMING DEVICE Filed Feb. 6. 1961 3 Sheets-Sheet 1 IN V EN TOR.

JAMES l, HAM/l ra/v 56.5 MQ

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Arron/v5 ys Dec. 1, 1964 J. 1.. HAMILTON 3,158,987

TIMING DEVICE Filed Feb. 6. 1961 3 Sheets-Sheet'Z INVENTOR. JAMES L.HAMILTON WM, 3% .flwaww Dec. 1, 1964 J. L. HAMILTON TIMING DEVICE 3Sheets-Sheet 3 Filed Feb. 6. 1961 m lq INVENTOR. JAMES L. HAMILTON BYMIG %%,Qmdf%- ,4 TT0RNEYS issu'edto P. H. Kaufmann.

United States Patent Filed Feb. 6, 1961, Ser. No. 87,328 6 Claims. c1.58-223) which a vehicle must travel in order to have continuous movementwithout stopping through a number of spaced traffic signals which aresequentially timed such that a vehicle traveling at a fixedpreselected'speed may pass through the signals without stop. Details ofconstruc tion of a timing device applied to a vehicle for the abovepurposes are found in United States Patent No. 2,598,701

According tothe presentinvention, a timing deviceis provided whichincludes improved means for setting the second hand to a predeterminedposition in its path of movement prior to initiation of a timingoperation. For

I In a preferred embodiment of the invention the timing device includesconventional minute and hour indicatinghandsinaddition to a sweep secondindicating hand. The timing device further includes a driving shaftwhich is rotated "in'any suitable manner to effect rotation of a drivenshaft to which the second hand is secured.' These shaftsare-conveniently rotatable about a common axis and are connected throughsuitable clutch means including asepar ate clutching part associatedwith each of the shafts;

The clutch actuating means includes movable to actuate the clutch means.The driven shaft is mounted for displacement along its axis of rotationin response to movement of the lever to carryits clutching part towardand away from the clutching part of the driving shaft) Theclutchactuating meansis conveniently operated in'response to energization of asuitable electrically energizable solenoid. The solenoid may beenergized by actuation of a suitable switch which is preferably locatedon a portion of the vehicle which is readitinned movement of the leversubsequent to its operationfor actuatingfthe clutch means. vForthispurpose a suitable cam is carried by the driven shaft to be engagedby the lever. The camand lever are configured such that the cam assumesa single stable position when engaged, by the; lever to provide thedesired setting of the second hand. The desired setting of-the secondhand is eifected without terminating the minute and-hour indicatinghands;

provide a timing device of improved construction.

normal rotation ofthe It istherefo re an objectfof thepre'sent inventionto a lever which i5 5 I It is another object of the invention to providea timing device having a sweep secondhand with improved means forsetting the'second hand to a predetermined position in its path ofmovement prior to initiation of a timing operation.

the second hand is carried bya driven shaft which is connected todriving means through clutch means with improved means for actuatingtheclutch means. i

It is still another object of the invention to provide a timing deviceincluding a sweep second hand carried by a driven shaft which isconnected to driving means through clutch means with clutch actuatingmeans effective to displace the driven shaft along its axis toactuate'the clutch means. i

It is a still further object of the invention to provide a timing deviceas defined in the preceding object wherein the clutch actuating means isalso effective to provide the desired setting of the second handsubsequent to its clutch actuating operation.

It is still another object'of the invention .to provide a timing devicewhich is of compact and inexpensive construction for installation inamotor vehicle forascertaining the timing characteristics of trafficsignals.

Other objects of the invention will become apparent from the followingdescription taken in conjunction with the accompanying drawings in whichi i i FIG. 1 is a view in elevation showing a portion of a motor vehiclehaving installed therein a timing device FIG. 2 is a view takeni alongthe line 22 of FIG. 3; i

FIG. 3 is aview taken'along the line 3-3 of FIG. 2; FIG. 4 is a view infrontelevation of the timing device; I

FIG. 5 is an enlarged view of a portion of the vehicle of FIG.,1 showinga switch attached to the gear shift lever for controlling the timingdevice; and

, FIG. 6 is a'vicw taken along the line 6-6 of FIG. 1. Referring .nowtothe drawings, there is illustrated in FIG. 1 a timing device 1constructed in accordance with the teachings of the present invention.Although the device 1 has many and varied uses, it is particularly advantageous in associationwith a motor vehicle for "the purpose ofascertaining and therefore predicting the timing characteristics oftraffic signals, and will be described in' this connection. A

As shown in FIG. 1, the device 1 is mounted on a .portion of the vehiclewhich is clearly visible'to the cooperate with numerals 6' to indicateseconds. The numerals 6' are observed to be arranged "substantially in acircle having a greater diameter .tharrthe circle defined by thenumerals 4. a In order to eifect rotation'of the several hands 4, 5 and6, the device 1 includes a driving system which may now be described.-As best shown in FIG. ,3, the driving system includes a main spindleor'driving shaft 7 which may be-rotated in any desired manner, such asby an electrical or spring type motor. The spindle 7 has spaced ends 8and 9 which are mounted respectively by bearings 10 and 11, such thatthe spindle 7 is rotatable about a horizontal axis when the timingdevice is positioned with the plate 3 extending vertically. The bearing10 may be secured in any suitable manner to a vertically extending rearsupporting plate 12. The plate 12 has attached thereto a bracket 13including a portion which extends parallel to the plate 12 and which isspaced forwardly therefrom toward the plate 3. The bracket 13 includesan opening through which the end 9 of the spindle 7 extends to providethe bearing 11.

The spindle 7 carries a suitable gear 14 which is in meshing engagementwith a gear 15 of larger radius supported on a spindle 16. The spindle16 is rotatable about a horizontal axis and is supported by spacedbearings 17 and 18. In order to provide the bearing 18 an extensionplate 19 which is secured to the face plate 3 has an opening throughwhich a restricted end 20 of the spindle16 extends.

The spindle 16 is observed to carry a gear 21 which is located beneath asupporting plate 22 which extends parallel to the plate 12 between thebracket 13 and plate 3, as illustrated in FIG. 2. The gear 21 is inmeshing engagement with a gear 23 of larger radius than the gear 21. Thegear 23 is loosely carried by a driven shaft or spindle 24 for rotationrelative to the spindle 24.

The driven shaft or spindle 24 extends along a horizontal axis throughan opening of the plate 22 and is supported in a manner appearinghereinafter. The gear 23 is integrally attached to a tubular hub 25which extends longitudinally of the spindle 24 to surround the spindle24. The minute indicating hand 5 is carried by the hub 25 at the outerend thereof, as shown in FIG. 3.

Adjacent the gear 23 is a gear 26 integrally formed on the hub 25 whichmeshes'with a larger gear 27 secured to a shaft 28 having ends extendingthrough openings 29 and 30, respectively, of the plates 22 and 3. A gear31 is integrally attached to the gear 27 and meshes with a gear 32having an integral tubular hub 33 which loosely surrounds the hub 25 forrotation relative to the hub 25. As shown in FIG. 3, the hub 33 hassecured thereto at its outer end the hour indicating hand 4. The variousgears described are proportioned so that the properrates of rotation ofthe hands 4 and 5 are obtained.

As best shown in FIG. 3, the spindle 24 extends through an opening ofthe plate 22 and is partially supported by a bearing 34 which is securedwithin the opening of the plate 22. It is noted also that the spindle24, the hub 25, and the hub 33 all project through an opening 35 of theface plate 3.

The supporting plates 12 and 22 may be mounted in spaced parallelrelation by a plurality of posts 36, 37 and 38. These posts may beprovided with rearwardly extending end portions for the purpose ofpermitting attachment of the device 1 to a suitable supporting surfacesuch as the dashboard or windshield molding of a vehicle.

As best shown in FIG. 3, the spindle 24 has a restricted outer end 39 towhich is secured the second indicating hand or pointer 6. As willpresently appear, a timing operation is initiated after rotation of thehand 6 from the spindle 7 has been terminated and the hand 6 has beenset to predetermined starting position in its path of travel. In orderto connect and disconnect the spindle 24 and the spindle 7 the inventionprovides clutch means associated with these spindles.

In the present invention the clutch means includes a clutching partcarried by the spindle 7 and a clutching part secured to the spindle 24.As shown in FIG. 3' a plate 46 is mounted by the spindle 7 at itsforward end between the bracket 13 and the plate 22 to cooperate with apointed projection 41 which extends from a plate 42 carried by thespindle 24. The plate 42 is mounted at the rear restricted end 43 of thespindle 24 such that the projection 41 is located between the plates 40and 42. The plate 40 is provided in any suitable manner with a clutchingsurface 40' with which the projection 41 is engageable to provide theclutching action. As an example, the clutching surface 40' mayconstitute a layer of suitable resilient material applied to the plate40 which is deformable by the point of the projection 41 when engagedthereby to provide a clutching action.

In order to permit actuation of the clutch means the invention providesthat the spindle 24 is mounted for displacement toward and away from theplate 40 along its axis of rotation, as will presently appear. Withrefer- ,ence to FIGS. 2 and 3, the spindles 7 and 24 are observed to bemounted for rotation substantially about a common axis which extendshorizontally as viewed in FIG. 3.

In order to actuate the clutch means above described, the inventionprovides a suitable electrically energizable solenoid 44 which includesa hollow cylinder 45 conveniently supported by a plate 46 secured to theplate 12 as by a screw member 47. The cylinder 45 carries a suitableelectrical winding 48 within its hollow which rriay consist of a numberof turns of insulated electroconductive wire. The winding 48 is shown inFIG. 2 as being positioned adjacent the wall of the cylinder 45 toprovide a suitable passage through the winding. The terminals 50 and 51of the winding 48 are illustrated in FIG. 2 as extending from a commonend of the cylinder to be attached to a suitable switch and to asuitable source of voltage to permit energization of the winding 48 asdescribed hereinafter.

The passage 49 through the winding 48 contains a suitable magneticarmature 52 and a suitable coil spring 53 which is positioned betweenone end of the armature and and end of the cylinder 45. The spring 53 isnormally in an expanded condition, as shown in FIG. 2, to bias thearmature 52 toward the opposite end of the cylinder when the solenoid isin a de-energized condition. A tubular partition 52 may be providedbetween the winding 48 and the armature 52 and spring 53 to extendlongitudinally of the cylinder 45.

Attached to the armature 52 in any suitable manner is an extension 54which projects outwardly of the cylinder, as shown in FIGS. 2 and 3. Theextension 54 includes a slot 55 extending longitudinally thereof fromone end, as clearly shown in FIG. 3. A pin 56 extends through a suitableopening of the extension 54 transversely through the slot 55. The pin 56also projects transversely through a slot 57 of [a lever 58 which issecured to a shaft 59 journaled in the plates 12 and 22.

The shaft 59 also carries an elongated lever 60 which is adjacent andparallel to the plate 22 in the space between the plates 12 and 22. Thelever 60 has the configuration illustrated in FIG. 2 and includes aninclined end surface 61, fora purpose described hereinafter. When thesolenoid 44 is energized the lever 60 will be moved towards the clutchmeans from its normal position shown in FIG. 2 in a plane which issubstantially transverse to the common axis of rotation of the spindles7 and 24.

In order to permit displacement of the spindle 24 along its axis, theinvention provides a resilient member 62 illustrated in the form of aspring which is attached to the support plate 22 as by a screw 63extending through one end of the spring. As best shown in FIG. 2, thespring 62 includes a forked terminal portion 64 having a pair of arms 65[and 66 which are spaced to define a slot 67 in which the restricted end43 of the spindle 24 is located.

The spring 62 also includes an inclined portion 69 which extends fromthe plate 22 toward the rear of the device as viewed in FIG. 3. Theforked extension 64 is connected to the portion 69 to extendsubstantially in a plane parallel to the plane of movement of the lever60. As

forengagement with the edge 60' of the lever 60, as will presentlyappear. The arms 65 and 66 are observed in FIG. 3 to be positionedbetween the plate 42 and a sur- 'cause the face 61' of the lever toslide over the surface of portion 69 to deflect the portion 69 and thearms 65 and 66 in a right'hand direction,,as viewed in FIG. 3. Thismovement of the arms 65 andv 66 will result in their engagement with thesurface 7 of the spindle 24 to move the spindle 24 toward the right, asviewed in FIG. 3, so that the plate 42 and its projection 41 is alsomovedin this direction. 7 Consequently, theprojection 41 is moved out ofengagement with the surface 40' of the plate 40, whereby the clutchparts are effectively disengaged and the spindles 7 and 24aredisconnected. Movement of the lever 60 in a direction opposite to thedirection previously described is effective to reverse the abovedescribed operations to return the projection 41 into clutchingengagement with the surface 40' of the plate 40. H

, In order to facilitate a timing operation, the invention providesmeans for setting the second hand 6 to a predetermined position in itspath of travel such as a vertical indicating position pniorftoinitiation of a timing operation. Such means is preferably operatedimmediately following actuation of the clutch means in response toenergization of the solenoid 44.

In the embodiment illustrated such hand setting means convenientlyincludes the plate 42. As illustrated in FIG. 2, the plate 42 is ofsubstantially heart-shaped configuration including peripheral surfaces72,73, and '74. The surfaces 73 and 74 are observed to have aconvexconfiguration, whereas the surface 72 is provided with a concaveconfiguration. The surfaces 72 and 73 are joined'by a curved apex 75 andthe surfaces 73 and 74 are joined by a curved apex76. In a similarmanner, the surfaces 74 and 72 are joined by a curved apex 77.

In the present invention the plate 42 and the lever 60 are positionedwith respect to each other such that the lever 60 will engage theperiphery of the platet42 in response to continued movement of the lever60 subsequent to its engagement with thespring 62 for effectingdisconnection of the spindles 7 and 24. The lever 60 and plate 42 are soconfigured that regardless of the position of the plate 42 about itsaxis when engaged by the surface 61 of the lever 60, the plate 42 isrotated so that the apices 75 and 77 bear against the surface 61 toprovide the only stable position of engagement between the periphery ofthe plate 42 and the surface 61. The second hand 6 is secured to thespindle 24 in such a position. about the spindle axis that the secondhand 6 will be located to indicate sixty or zero seconds, as shown inFIG. 4, for the stable position of the plate 42; The-arrangement is suchthat-when the surface 61 of the lever 60 engages the plate 42, the face61 of the lever also engages the portion-69 to maintain the spindles 7and 24 disconnected. It is observed that the setting of the hand 6 iseffected without terminating rotation of the hands 4 and 5.

The driver of the vehicle is normally seated behind the U steering wheelwith ready access to a gear shift lever 7 8 which extends fromthesteering shaft. The lever 78 is observed in FIG. I tohave a bracket 79secured thereto, as by a suitable clamping "device 80. The bracket 79includes a projecting part to which asuitable switch 81 is attached. Theswitch 31 is actuat'able in any suitable manner, such as by the pressingof a button, to connect a pair of conductors 82 and 83 leadingrespectively to one of the terminals 50 and 51 of the winding 48 and toa suitable source of electrical voltage to'which the other cations ofthe timing device.

.of the terminals 50 and 511s connected. Such voltage source mayconveniently comprise the battery normally employed in the vehicle. Theconductors 82 and 83 may be clamped to the bracket 79 as by clamps 84and 85. The button actuated switch 81 may have locations other thanthose shown. For example, the switch may be associated with aconventional directional signal lever (not shown), or may be positionedwithin a hollow gear shift or signal lever.

Also, the switch may be foot operatedif desired. Instead of a two wiresystem, a single wire and groundsystem maybe employed. g

In operation, when it is desired to effect a timingoporation, the drivermerely actuates the switch 81 to effect energization of the winding 48*of the solenoid. Such energization results in movement of the armature52 withment of theface 61' of the lever ,60 with the surface'of theinclined portion 69 to effect the clutch actuating operation fordisconnecting the spindles 7 and 24. Im mediately followingdisconnectionof the spindles the lever 60 is moved to the position wherein thesurface 61 thereof engages the peripheral surface of the plate 42. Suchengagement results in rotation of the plate 42 in ;a direction dependentupon the point of engagement and the establishment of the stable camposition previously described, such that the second hand 6 is positionedto indicate sixty or zero seconds, as viewed in FIG. 4. i

The operations above described are effected very rapidly in response toenergization of the solenoid and when the hand 6 has assumed theposition shown in FIG. 4, the button of the switch 31 is released toinitiate the timing operation. Such release is effective to deenergizethe solenoid to reverse the sequence of operations previously cdescribed. The arrangement of parts is such thatthe operatoris requiredto maintain actuation of the switch for only a very short time interval,such as a fraction of a second, in order to preset the hand 6. Overloadpro tection is preferably provided to prevent damage to the solenoidwhich might result if the button is depressed for an extended period. cp

De-energiza-tion of the winding 48 of the solenoid by release of theswitch button results in movement of the armature 52 in the directionopposite to that previously describedby the expanding action of thespring 53. This movement results in a counterclockwise rotation of thelever 60 wherein the surface 61 is disengaged from the apices 75 and 7,7of the plate 42. Continued movement of the lever .60 in thecounterclockwise direction resultsin disengagement of the lever 60 withthe spring 62, such that the forked extension 64 moves to the left, asviewed in FIG. 3, to actuate the clutch means for connecting thespindles 7 and 24. The lever 60,;then returns to its normal position, asshown in FIG. 2 and the second hand 6 begins to rotate from its presetposition to initiate the timing operation. i

It is to be understood that the solenoid44 together with its connectionsto the shaft59 may be omitted and replaced by other means effective topermit rotation of the shaft 5 9. If desired, means also may be providedto permit manual rotation of the shaft for certain appli- .Although theinvention has been described with ref erence to certain specificembodiments thereof, numerous modifications are possible, and it isdesired to cover all appended claims 1 c Having thus described myinvention, I clairnz 1. In a timing device, driving and driven shaftsindemodificat io'ns. falling within the spirit and scope of thependently rotatableabout a common. axis, a time indicating pointersecured to the driven shaft for rotation therewith, clutch meansincluding a pair of clutching parts each carried by a separate one ofsaid shafts, means mounting said driven shaft for displacement along itsaxis relative to the driving shaft to move the clutching part carriedthereby into and out of clutching engagement with the clutching partcarried by the driving shaft, clutch actuating means including a membermovable in a plane substantially transverse to said common axis toeffect displacement of said driven shaft along its axis of rotation, andcam means secured to said driven shaft, said member being movable intoand out of engagement with said cam means after effecting displacementof said driven shaft, said cam means having a single stable position ofengagement with said member corresponding to a preselected position ofthe pointer, and a solenoid effective when energized to move said memberinto engagement with said cam means subsequent to movement of the drivenshaft clutching part out of clutching engagement with the driving shaftclutching part, and effective when de-energized to allow said member tomove out of engagement with said cam means.

2. In a timing device, driving and driven shafts independently rotatableabout a common axis, a time indicating pointer secured to the drivenshaft for rotation therewith, clutch means including a pair of clutchingparts each carried by a separate one of said shafts, means mounting saiddriven shaft for displacement along its axis relative to the drivingshaft to move the clutching part carried thereby into and out ofclutching engagement with the clutching part carried by the drivingshaft, clutch actuating means including a member movable in a planesubstantially transverse to said common axis to effect displacement ofsaid driven shaft along its axis of rotation, said clutch part carriedby said driven shaft including a heart-shaped cam member having aperipheral surface including a pair of convex surfaces connected by aconcave surface, said member having a straight surface portion movableinto and out of engagement with said peripheral surface after saidmember has effected displacement of said drive shaft, said cam memberhaving a single stable position of engagement with said straight surfaceportion corresponding to a preselected position of said pointer, andmeans for moving said straight surface portion into'engagement with saidperipheral surface subsequent to movement of the clutching part carriedby the drivenshaft out of clutching engagement with the clutching partcarried by the driving shaft and for moving said straight surfaceportion out of engagement with said peripheral surface.

3. In a timing device, driving and driven shafts independently rotatableabout a common axis, a time indicating pointer secured to the drivenshaft for rotation therewith, clutch means including a pair of clutchingparts each carried by a separate one of said shafts, means mounting saiddriven shaft for displacement along its axis relative to the drivingshaft to move the clutching part carried thereby into and out ofengagement with the clutching part carried by the driving shaft,resilient means urging said clutch parts together and including anelongated spring means having a portion inclined with respect to saidcommon axis of said shafts, clutch actuating means including a membermovable in a plane substantially transverse to said common axis toengage said inclined portion of said elongated spring means to effectdisplacement of said driven shaft along its axis of rotation, and cammeans secured to said driven shaft for axial displacement with thedriven shaft, said member being movable into and out of engagement withsaid cam means after effecting displacement of said drive shaft, saidcam means having a single stable position of engagement with said membercorresponding to a preselected position of said pointer.

4. In a timing device, driving and driven shafts independently rotatableabout a common axis, a time indicating pointer secured to the drivenshaft for rotation there- .means to disengage said clutch parts and astraight surface portion, and heart-shaped cam means seemed to saiddriven shaft and displaceable therewith, said substantially straightsurface portion being movable into and out of engagement with said cammeans after disengagement of said clutch parts, said cam means having asingle stable position of engagement with said straight surface portioncorresponding to a preselected position of said pointer. 5. In a timingdevice, driving and driven shafts independently rotatable about a commonaxis, clutch means including a pair of clutching parts each carried by aseparate one of said shafts, means mounting said driven shaft fordisplacement along the common axis relative to the driving shaft to movethe clutching part carried thereby into and out of clutching engagementwith the clutching part carried by said driving shaft, and clutchactuating means including resilient spring means positioned adjacentsaid driven shaft and operatively connected to said driven shaft tonormally bias said driven shaft clutching part into clutching engagementwith the driving shaft clutching part and a member supported adjacentsaid driven shaft and movable in a plane substantially transverse tosaid common axis to effect displacement of said driven shaft along thecommon axis, said resilient spring means having a portion positioned insaid plane of movement of said movable member and'engaged by said memberupon movement thereof to effect deflection of said spring means anddisplacement of said driven shaft and the clutching part carried therebyalong the common axis out of clutching engagement with the clutchingpart carried by said driving shaft.

6. A timing device having an indicator movable from a reference pointand resettable to the reference point comprising a driven shaft membersupporting said indicator for rotation therewith, a driving shaft memberrotatable about an axis common with the axis of rotation of said drivenshaft member, clutch means including a pair of clutching parts eachcarried by a separate one of said shafts, said driven shaft beingmounted for displacement along its axis relative to the driving shaft tomove the clutching part carried thereby into and out of clutchingengagement with the clutching part carried by the driven shaft, biasingspring means operatively connected to said driven shaft and operable tohold said driven shaft in a position wherein said clutching parts are inengagement, a member movable transverse to said common axis andoperatively associated with said biasing means and driven shaft to movesaid driven shaft axially against said biasing member to disengage saidclutching parts, and cam means mounted on said driven shaft andengageable by said member upon movement thereof to effect rotation ofsaid driven shaft to position said indicator at said reference pointafter displacement of said driven shaft.

References Cited in the file of this patent UNITED STATES PATENTS

1. IN A TIMING DEVICE, DRIVING AND DRIVEN SHAFTS INDEPENDENTLY ROTATABLEABOUT A COMMON AXIS, A TIME INDICATING POINTER SECURED TO THE DRIVENSHAFT FOR ROTATION THEREWITH, CLUTCH MEANS INCLUDING A PAIR OF CLUTCHINGPARTS EACH CARRIED BY A SEPARATE ONE OF SAID SHAFTS, MEANS MOUNTING SAIDDRIVEN SHAFT FOR DISPLACEMENT ALONG ITS AXIS RELATIVE TO THE DRIVINGSHAFT TO MOVE THE CLUTCHING PART CARRIED THEREBY INTO AND OUT OFCLUTCHING ENGAGEMENT WITH THE CLUTCHING PART CARRIED BY THE DRIVINGSHAFT, CLUTCH ACTUATING MEANS INCLUDING A MEMBER MOVABLE IN A PLANESUBSTANTIALLY TRANSVERSE TO SAID COMMON AXIS TO EFFECT DISPLACEMENT OFSAID DRIVEN SHAFT ALONG ITS AXIS OF ROTATION, AND CAM MEANS SECURED TOSAID DRIVEN SHAFT, SAID MEMBER BEING MOVABLE INTO AND OUT OF ENGAGEMENTWITH SAID CAM MEANS AFTER EFFECTING DISPLACEMENT OF SAID DRIVEN SHAFT,SAID CAM MEANS HAVING A SINGLE STABLE POSITION OF ENGAGEMENT WITH SAIDMEMBER CORRESPONDING TO A PRESELECTED POSITION OF THE POINTER, AND ASOLENOID EFFECTIVE WHEN ENERGIZED TO MOVE SAID MEMBER INTO ENGAGEMENTWITH SAID CAM MEANS SUBSEQUENT TO MOVEMENT OF THE DRIVEN SHAFT CLUTCHINGPART OUT OF CLUTCHING ENGAGEMENT WITH THE DRIVEN SHAFT CLUTCHING PART,AND EFFECTIVE WHEN DE-ENERGIZED TO ALLOW SAID MEMBER TO MOVE OUT OFENGAGEMENT WITH SAID CAM MEANS.